Analysis of voice register transition focused on the relationship between pitch and formant frequency
نویسندگان
چکیده
When the voice register transition (VRT) occurs, vocal-folds motion becomes unstable and the voice pitch jumps abruptly. In this article, we examine the relationship between the fundamental frequency f0 and the first-formant frequency F1 in VRT to reveal the influence of the source–filter interaction (SFI) on VRT. Five Japanese male speakers produced rising glissandos with vowels /a/ and /i/. The vibratory state of the vocal folds and the vocal tract resonances were measured simultaneously with an electroglottograph device and an external acoustic excitation method. We analyzed the temporal change in f0 from electroglottograph signals and in F1 using acoustic response signals. The relationship between f0 and F1 were then analyzed to determine the cause of VRT and abrupt f0 jump. As a result, f0 was very close to F1 when VRT arose in /i/, indicating the influence of SFI as a cause of VRT.
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